<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        
        html,
        body {
            height: 100%;
        }
        
        section {
            width: 20%;
            height: 100%;
            float: left;
        }
        
        section h3 {
            text-align: center;
            padding: 30px 0;
            color: #fff;
            font-weight: bolder;
        }
        
        section:nth-child(1) {
            background: palegoldenrod;
        }
        
        section:nth-child(2) {
            background: palegreen;
        }
        
        section:nth-child(3) {
            background: paleturquoise;
        }
        
        section:nth-child(4) {
            background: palevioletred;
        }
        
        section:nth-child(5) {
            background: peachpuff;
        }
        
        @media (max-width:760px) {
            section {
                width: 100%;
                height: 20%;
            }
        }
    </style>
</head>

<body>
    <section>
        <h3>个人介绍</h3>
    </section>
    <section>
        <h3>个人介绍</h3>
    </section>
    <section>
        <h3>个人介绍</h3>
    </section>
    <section>
        <h3>个人介绍</h3>
    </section>
    <section>
        <h3>个人介绍</h3>
    </section>
</body>

</html>